化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (12) : 213-219. DOI: 10.19817/j.cnki.issn1006-3536.2024.12.011

科学研究

Ag/MoS₂/ZnIn₂S₄复合光催化剂的制备及其光催化降解和还原性能研究

作者信息 +

Study on the preparation of Ag/MoS₂/ZnIn₂S₄ composite photocatalysts and their photocatalytic degradation and reduction performance

Wang Lan, Zhang Shuo, Yue Feng, Ma Weihao, Tan Bang, Zhang Hongzhong

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文章历史 +

Received		Published
2023-09-20		2024-12-20
Issue Date	Revised Date
2024-12-12	2023-09-20

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摘要

首先采用溶剂热法制备片层结构组装而成的花朵状二硫化钼/硫化铟锌(MoS₂/ZnIn₂S₄)微球异质结构,该方法实现了ZnIn₂S₄和MoS₂间紧密的界面接触,形成了良好的电子传输通道有利于光生电荷载流子的传输。其次利用光沉积法将Ag纳米粒子负载在MoS₂/ZnIn₂S₄微球异质结构上,得到三元Ag/MoS₂/ZnIn₂S₄复合光催化剂。得益于Ag纳米粒子的等离子体效应及电子助催化剂作用,Ag/MoS₂/ZnIn₂S₄复合光催化剂在处理高浓度印染废水罗丹明B(RhB)、亚甲基蓝(MB)和六价铬Cr(Ⅵ)的实验中表现出优异的性能,Ag/MoS₂/ZnIn₂S₄对RhB、MB和Cr(Ⅵ)的光催化降解效率和光催化还原效率分别达到100%、100%和99.3%,说明Ag/MoS₂/ZnIn₂S₄具有良好的催化活性。通过X射线衍射仪、扫描电子显微镜、透射电子显微镜、X射线光电子能谱仪和紫外-可见漫反射光谱仪等论证了复合催化剂的优异性能并提出了光催化反应机理。

Abstract

Firstly,a flower-like MoS₂/ZnIn₂S₄ microsphere heterostructure with a layered structure was prepared using the solvothermal method.This approach achieved tight interfacial contact between ZnIn₂S₄ and MoS₂,forming effective electron transport channels that facilitated the transfer of photogenerated charge carriers.Subsequently,Ag nanoparticles were loaded onto the MoS₂/ZnIn₂S₄ microsphere heterostructure using the photodeposition method,resulting in a ternary Ag/MoS₂/ZnIn₂S₄ composite photocatalyst.Thanks to the plasmonic effect of the Ag nanoparticles and their role as electron co-catalysts,the Ag/MoS₂/ZnIn₂S₄ composite photocatalyst exhibited outstanding performance in the treatments of high-concentration textile wastewater containing Rhodamine B (RhB),Methylene Blue (MB),and hexavalent chromium Cr(Ⅵ).The photocatalytic degradation efficiencies for RhB,MB,and the photocatalytic reduction efficiency for Cr(Ⅵ) reached 100%,100%,and 99.3%,respectively,demonstrating the excellent catalytic activity of Ag/MoS₂/ZnIn₂S₄.The superior performance of the composite catalysts and the photocatalytic reaction mechanisms were further validated and proposed through X-ray diffraction,scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy,and UV-visible diffuse reflectance spectroscopy.

关键词

印染废水 / Ag/MoS₂/ZnIn₂S₄复合光催化剂 / 光催化降解与还原 / 有机染料 / 六价铬

Key words

printing and dyeing wastewater / Ag/MoS₂/ZnIn₂S₄ composite photocatalyst / photocatalytic degradation and reduction / organic dye / Cr(Ⅵ)

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Ag/MoS₂/ZnIn₂S₄复合光催化剂的制备及其光催化降解和还原性能研究[J]. 化工新型材料, 2024, 52(12): 213-219 DOI:10.19817/j.cnki.issn1006-3536.2024.12.011

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